Who has created an appointment?

Is it possible to see somewhere in the appointment of a shared calendar who has entered it?

We use the Calendar app to manage the appointments of a workgroup or the occupancy dates of room resources. All group members should be able to enter their appointments or reservations.
If appointments collide, it would be nice to be able to ask the initiator of other appointments whether appointments can be rescheduled. To do this, however, the description of an appointment should tell who created it. It would be even better if you could send queries directly (by e-mail) to the initiator.

Thanks Friedbert

Our environment:
NC 27.1.4
Calendar 4.6.0

Not sure if the audit app can do it?

A more manual way:
Go to the appointment, go on the details in the web-interface. There you have an option to export the appointment. You can save the ics file.
In this *.ics file, you have a line with the creation date:


Now, you can go to the webserver log, and check for an entry that was done at this date, for this test entry on nginx it gives:

ip - - [24/Dec/2023:01:04:46 +0100] nextcloud.example.com "PUT /remote.php/dav/calendars/username/default/31643592-378A-42B4-933C-4E3A10595C49.ics HTTP/2.0" 201 0 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0" "-"

sometimes after the ip address the user name is shown (not here).